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76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
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// Copyright (C) 2000 Sean Cavanaugh
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// This file is licensed under the terms of the Lesser GNU Public License
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// (see LPGL.txt, or http://www.gnu.org/copyleft/lesser.txt)
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#ifndef ZONING_H__
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#define ZONING_H__
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#if _MSC_VER >= 1000
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#pragma once
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#endif
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#include "basictypes.h"
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#include "winding.h"
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#include "boundingbox.h"
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// Simple class of visibily flags and zone id's. No concept of location is in this class
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class Zones
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{
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public:
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inline void flag(UINT32 src, UINT32 dst)
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{
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if ((src < m_ZoneCount) && (dst < m_ZoneCount))
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{
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m_ZonePtrs[src][dst] = true;
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m_ZonePtrs[dst][src] = true;
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}
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}
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inline bool check(UINT32 zone1, UINT32 zone2)
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{
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if ((zone1 < m_ZoneCount) && (zone2 < m_ZoneCount))
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{
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return m_ZonePtrs[zone1][zone2];
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}
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return false;
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}
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void set(UINT32 zone, const BoundingBox& bounds);
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UINT32 getZoneFromBounds(const BoundingBox& bounds);
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UINT32 getZoneFromWinding(const Winding& winding);
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public:
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Zones(UINT32 ZoneCount)
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{
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m_ZoneCount = ZoneCount + 1; // Zone 0 is used for all points outside all nodes
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m_ZoneVisMatrix = new bool[m_ZoneCount * m_ZoneCount];
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memset(m_ZoneVisMatrix, 0, sizeof(bool) * m_ZoneCount * m_ZoneCount);
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m_ZonePtrs = new bool*[m_ZoneCount];
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m_ZoneBounds = new BoundingBox[m_ZoneCount];
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UINT32 x;
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bool* dstPtr = m_ZoneVisMatrix;
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bool** srcPtr = m_ZonePtrs;
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for (x=0; x<m_ZoneCount; x++, srcPtr++, dstPtr += m_ZoneCount)
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{
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*srcPtr = dstPtr;
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}
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}
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virtual ~Zones()
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{
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delete[] m_ZoneVisMatrix;
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delete[] m_ZonePtrs;
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delete[] m_ZoneBounds;
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}
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protected:
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UINT32 m_ZoneCount;
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bool* m_ZoneVisMatrix; // Size is (m_ZoneCount * m_ZoneCount) and data is duplicated for efficiency
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bool** m_ZonePtrs; // Lookups into m_ZoneMatrix for m_ZonePtrs[x][y] style;
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BoundingBox* m_ZoneBounds;
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};
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Zones* MakeZones();
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#endif
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